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Find detailed reviews about specific areas of Washington’s transportation system in our collection of planning studies.

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49 results

Anacortes/San Juan Islands Schedule Update

Location:
Timeline: Spring 2023 - Summer 2024
  • In progress
  • Improve on-time performance​.
  • Support reliability of service and system​.
  • Provide adequate travel opportunities for key user groups​.
  • Maintain as much capacity as possible​.

Task Force

In addition to broad community

I-5 Fort Lewis Weigh Station Study

Location: I-5
Timeline: August 2020 - June 2021
  • Complete
  • Thurston County
  • Pierce County

The Fort Lewis Weigh Station located along northbound Interstate 5 near DuPont in Pierce County is in need of updating. Freight traffic in the area experiences recurring congestion and delay due to high volumes from both freight and commuter traffic. The weigh station was built in 1969 and in

I-5 Operations and Demand Analysis

Location: I-5, SR 11, SR 539, SR 542
Timeline: July 2018 - September 2020
  • Complete
  • Whatcom County

The Northwest Region Mount Baker Area is leading this effort to address several mobility challenges along segments of the I-5 corridor within the urban area of Bellingham (MP 250 to MP 258). Congestion occurs regularly during peak travel at the I-5 interchanges and on the connecting regional

I-5 Skagit Transportation Study

Location: I-5
Timeline: March 2023 - July 2024
  • In progress
  • Skagit County

The 9-mile stretch of I-5 between Mount Vernon and Burlington is the backbone of the transportation network in Skagit County, powering the economy, linking local businesses to regional markets and connecting people to jobs, goods and each other. To plan for future growth, address safety and

I-5 Study

Location: I-5
Timeline: Ongoing
  • In progress

In Spring 2022 the Legislature initiated the Move Ahead Washington funding package to create planning and environmental linkages studies for Interstate 5. This work will ultimately create a master plan for the critical I-5 corridor that meets current and future transportation needs, and reflects

I-5 Tumwater to Mounts Road Corridor Planning and Environmental Linkages Study

Location: I-5
Timeline: Spring 2020 - Spring 2022
  • Complete
  • Thurston County
  • Pierce County

The "Planning and Environmental Linkages Study" (PEL study) built upon the goals and strategies outlined in the original 2020 Corridor Study. This PEL Study represents a collaborative and integrated approach to transportation decision-making that:

  1. Considers environmental, community

North Lewis County Industrial Access Transportation Study

Location: I-5
Timeline: Sept. 2022 - Summer 2023
  • In progress
  • Lewis County

To keep people and goods moving throughout western Washington State, the Washington State Department of Transportation is working with local stakeholders and government leaders to conduct a study to assess existing environmental and traffic conditions and reviewing new

South Pierce Multimodal Connectivity Study

Location: SR 162, SR 161, SR 7, SR 507, I-5
Timeline: Spring 2022 - Summer 2023
  • In progress
  • Pierce County

This study will address key priorities of safety, multimodal connectivity and reducing delays for all users of transportation facilities. WSDOT and the study partners aim to identify feasible strategies that improve transportation performance for all travelers.

SR 105 West Harriman Street Signal - Roundabout Pre-Design Study

Location: SR 105
Timeline: January 2021 - May 2021
  • Complete
  • Grays Harbor County

The pre-design study looked at the signalized intersection on SR 105, South Boone Street, at West Harriman Street. The aging traffic signal at this intersection was last replaced in 1982 and is in need of replacement. The pre-design study conducted stakeholder and public outreach to examine

SR 112 Clallam Bay Pre-Design Study

Location: SR 112
Timeline: January to August 2023
  • In progress
  • Clallam County

State Route 112 at Weel Road and Eagle Crest Way is just south of Clallam Bay. This study will make recommendations for improvements at the intersection. The study will engage local stakeholders and the community to identify these improvements. Recommendations made as part of this study will

SR 142 - Safety and Accessibility Study

Location: SR 142
Timeline: 2019 - 2022
  • On hold
  • Klickitat County

Currently, pedestrian access along State Route 142 is limited for people who walk, bike or roll alongside the highway. With input from community members, elected officials and stakeholders, we will develop a plan to improve accessibility for all modes in the community of Klickitat. 

SR 16 - Tacoma Narrows Bridge to SR 3 Congestion Study

Location: SR 16
Timeline: November 2016 - December 2018
  • Complete
  • Kitsap County
  • Pierce County

The study identifies corridor strategies and solutions to address congestion and traffic operations along State Route 16 between the Tacoma Narrows Bridge and Gorst, as well as portions of SR 3 and SR 304 in Pierce and Kitsap counties. 

SR 160 Long Lake Road SE Planning Study

Location: SR 160
Timeline: Fall 2016 - Spring 2018
  • Complete
  • Kitsap County

A study was completed of SR 160 between Phillips Road and Mayvolt Road Southeast/Lake Valley Road Southeast in Kitsap County. The study identified intersection control strategies that have the potential to reduce the frequency and severity of crashes at the intersection of SR 160 (SE Sedgwick

SR 162 Sumner to Orting Corridor Planning Study

Location: SR 162
Timeline: Spring 2016 - Spring 2017
  • Complete
  • Pierce County

State Route 162 is an important north-south link through the Orting Valley community and the surrounding area of southeast Pierce County. The area experiences a high level of growth and development resulting in peak hour congestion that places demands on the highway system. The study identified

SR 166 Bay Street/Bethel Avenue/Maple Avenue Intersection Pre-Design Study

Location: SR 166
Timeline: December 2019 - June 2020
  • Complete
  • Kitsap County

A pre-design study was conducted at the intersection of SR 166 and Bay Street, Bethel Avenue and Maple Street in Port Orchard. The existing traffic signal at this intersection has reached the end of its useful life. This in-depth review included collaboration with local business owners, City of

SR 167 Master Plan

Location: SR 167
Timeline: The SR 167 Master Plan started in earnest in fall 2021 and we anticipate completing the SR 167 Master Plan update in 2023.
  • In progress
  • Pierce County
  • King County

The Puget Sound region is thriving and attracting large population and employment growth. This growth increases strain on our transportation infrastructure and services, resulting in increased traffic congestion and increased needs for maintenance and preservation. There is a need to move people

SR 20 - Discovery Road & Kearney Street Intersection Roundabouts Pre-Design Study

Location: SR 20
Timeline: Spring 2020 - Fall 2020
  • Complete
  • Jefferson County

SR 20 Skagit O'Brian Reach Feasibility Study

Location: SR 20
Timeline: January 2022 - December 2023
  • In progress
  • Skagit County

The SR 20 Skagit River O’Brian Reach Feasibility Study area is located along SR 20 near Rockport at milepost 101. The purpose of the study is to assess floodplain connectivity and channel processes to determine if there is a feasible floodplain restoration action that:

  • Reduces

SR 202 - E Lake Sammamish Parkway to 244th Ave NE - Corridor Planning Study

Location: SR 202
Timeline: Summer 2018 - Summer 2019
  • Complete
  • King County

State Route 202 is an important east-west link for King County communities like Woodinville, Redmond, Sammamish, Fall City and North Bend. Thanks to growth and development, traffic on SR 202 has increased in the last decade, contributing to longer travel times for commuters and freight.

SR 202 Corridor Studies

Location: SR 202
Timeline: Fall 2020 - Winter 2022
  • In progress
  • King County

We are conducting two corridor studies along SR 202. One study will focus on safety concerns between 244th Ave. NE to 324th Ave. SE, and the second study will cover community needs between 324 Ave. SE and SR 203 in Fall City.

Both studies will document strategies to improve operations,

SR 24 East Valley to Moxee Corridor Study

Location:
Timeline: June 2022 - April 2023
  • In progress
  • Yakima County

The study will collaboratively address the transportation network performance, accessibility and safety gaps to support local communities and the traveling public in the East Valley area. The study will identify ranked strategies to increase mobility and transportation alternatives for all modes

SR 3 Roundabouts Pre-Design Study

Location: SR 3
Timeline: March - April 2022
  • Complete
  • Mason County

WSDOT routinely reviews rural intersections on the state highway system to find ways to reduce potential crashes. We look for locations that are at the highest risk for severe crashes.

This project will construct single-lane roundabouts on East Agate Road and East Pickering Road in Mason

SR 302 Elgin Clifton Road to SR 16 Corridor Study

Location: SR 302
Timeline: Fall 2007 - June 2013
  • On hold
  • Pierce County
  • Kitsap County

SR 302, an important east-west link for Key Peninsula communities, has been the subject of a corridor study designed to conform with the decision making requirements of the National Environmental Policy Act (NEPA). This area of the state's highway system located in Pierce and Kitsap counties has

SR 302 Roundabout Pre-Design Study

Location: SR 302
Timeline: January - August 2023
  • In progress
  • Pierce County

Information about the study, the conceptual roundabout drawing and feedback WSDOT received during the online open house is now available for

SR 302 Victor Area Corridor Study

Location: SR 302
Timeline: Summer 2022 - Spring 2023
  • In progress
  • Mason County
  • Pierce County

SR 302 is an important east-west link through Mason and Pierce Counties. The road is an important connection for Belfair and Purdy. It also provides a connection between SR 3 and SR 16 for residents, businesses and visitors.

The study will look at improvements to address roadway collapse

SR 303 Corridor Study

Location: SR 303
Timeline: July 2019 - August 2021
  • Complete
  • Kitsap County

The City of Bremerton and WSDOT completed a comprehensive planning study of the SR 303 (Warren/Wheaton) corridor. Using the Practical Solutions approach, the study will look at the corridor from Burwell Street to NE Fairgrounds Road, particularly the segments within city limits. The study will

SR 503 Corridor Plan: Vancouver to Battle Ground

Location: SR 503
Timeline: February 2022 - Summer 2023
  • In progress
  • Clark County

WSDOT is studying how people use SR 503 and how continued growth might affect future use. Focus areas include addressing gaps in active transportation (e.g., biking, walking and rolling) facilities, access to transit, vehicle traffic pain points, safety improvements and freight mobility planning

SR 507 and SR 702 Roundabouts Pre-design Study

Location: SR 702, SR 507
Timeline: November 2021 - January 2022
  • Complete
  • Pierce County

WSDOT routinely reviews rural area intersections on its state highway system to find ways to reduce potential crashes. As a result of this review, we will replace the existing stop signs at three intersections in Pierce County with single-lane roundabouts. These roundabouts fit within the

SR 507 Roundabout Pre-design Study

Location: SR 507
Timeline: November 2022 - April 2023
  • In progress
  • Thurston County

Each year, WSDOT looks at all rural stop-controlled intersections on our state highways to identify ways to reduce potential crashes. For some intersections, WSDOT develops a safety plan that outlines ways to manage travel speeds and reduce conflict points.

As a result of a recent safety

SR 510 at McAllister/Rockcress Roundabout Pre-Design Study

Location: SR 510
Timeline: January - March 2022
  • Complete
  • Thurston County

To reduce potential crashes, we complete routine reviews of rural area intersections on the state highway system. As a result of this review, we will construct a roundabout on SR 510 at the intersection of McAllister Court SE/Rockcress Drive SE and remove the existing stop signs. This roundabout

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